14 documents found, page 1 of 2
Comparative anatomy of the pelvic nerves in bearded capuchins (Sapajus sp)
Silva, Ediana Vasconcelos da; Silva, Sylla Figueredo da; Aversi-Ferreira, Roqueline Ametila Glória Martins de Freitas; de Abreu, Tainá; Nishijo, HisaoBearded capuchins (Sapajus sp), unexpectedly, share with chimpanzees behavioral features such as high cognitive ability, good memory, tool use with intermittent bipedalism, and social tolerance; although its anatomy is still little studied. To test the hypothesis that bearded capuchins might share similar anatomical features with chimpanzees, we investigated the pelvic nerves of the bearded capuchin and compare...
Comparative anatomical study of the leg's nerves of Cebus (barbed capuchins) wi...
Abreu, Tainá de; Pfrimer, Gabriel A.; Aversi-Ferreira, Roqueline Ametila Glória Martins de Freitas; Brandão, Lorraine D.; Maior, Rafael Plakoudi SoutoOs estudos anatômicos comparativos entre os primatas são importantes para pesquisas associadas com a etologia, evolução, taxonomia e compreensão dos usos de ferramentas pelos hominídeos. Especificamente, o conhecimento anatômico sobre Cebus contribui para sua própria conservação e para o desenvolvimento de procedimentos cirúrgicos e tratamentos clínicos destes animais, pois são frequentemente vítimas de acident...
Fast detector/ first responder: Interactions between the superior colliculus-pu...
Soares, Sandra Cristina de Oliveira; Maior, Rafael S.; Isbell, Lynne A.; Tomaz, Carlos; Nishijo, HisaoPrimates are distinguished from other mammals by their heavy reliance on the visual sense, which occurred as a result of natural selection continually favoring those individuals whose visual systems were more responsive to challenges in the natural world. Here we describe two independent but also interrelated visual systems, one cortical and the other subcortical, both of which have been modified and expanded i...
Population coding of facial information in the monkey superior colliculus and p...
Nguyen, Huy Hoang; Nishimaru, Hiroshi; Matsumoto, Jumpei; Le, Quan Van; Hori, Etsuro; Maior, Rafael Plakoudi Souto; Tomaz, Carlos Alberto BezerraThe superior colliculus (SC) and pulvinar are thought to function as a subcortical visual pathway that bypasses the striate cortex and detects fundamental facial information. We previously investigated neuronal responses in the SC and pulvinar of monkeys during a delayed nonmatching-to-sample task, in which the monkeys were required to discriminate among 35 facial photos of five models and other categories of v...
Snakes elicit earlier, and monkey faces, later, gamma oscillations in macaque p...
Le, Quan Van; Isbell, Lynne A.; Matsumoto, Jumpei; Le, Van Quang; Nishimaru, Hiroshi; Hori, Etsuro; Maior, Rafael Plakoudi Souto; Tomaz, CarlosGamma oscillations (30–80 Hz) have been suggested to be involved in feedforward visual information processing, and might play an important role in detecting snakes as predators of primates. In the present study, we analyzed gamma oscillations of pulvinar neurons in the monkeys during a delayed non-matching to sample task, in which monkeys were required to discriminate 4 categories of visual stimuli (snakes, mon...
Neuronal response sto face-like and facial stimuli in the monkey superior colli...
Nguyen, Minh Nui; Matsumoto, Jumpei; Hori, Etsuro; Maior, Rafael Plakoudi Souto; Tomaz, Carlos Alberto Bezerra; Tran, Anh Hai; Ono, TaketoshiThe superficial layers of the superior colliculus (sSC) appear to function as a subcortical visual pathway that bypasses the striate cortex for the rapid processing of coarse facial information. We investigated the responses of neurons in the monkey sSC during a delayed non-matching-to-sample (DNMS) task in which monkeys were required to discriminate among five categories of visual stimuli [photos of faces with...
Morphometric and statistical analysis of the palmaris longus muscle in human an...
Aversi-Ferreira, Roqueline Ametila Glória Martins de Freitas; Bretas, Rafael Vieira; Maior, Rafael Plakoudi Souto; Davaasuren, MunkhzulThe palmaris longus is considered a phylogenetic degenerate metacarpophalangeal joint flexor muscle in humans, a small vestigial forearm muscle; it is the most variable muscle in humans, showing variation in position, duplication, slips and could be reverted. It is frequently studied in papers about human anatomical variations in cadavers and in vivo, its variation has importance in medical clinic, surgery, rad...
Monkey pulvinar neurons fire differentially to snake postures
Le, Quan Van; Isbell, Lynne A.; Matsumoto, Jumpei; Le, Van Quang; Hori, Etsuro; Tran, Anh Hai; Maior, Rafael Plakoudi SoutoThere is growing evidence from both behavioral and neurophysiological approaches that primates are able to rapidly discriminate visually between snakes and innocuous stimuli. Recent behavioral evidence suggests that primates are also able to discriminate the level of threat posed by snakes, by responding more intensely to a snake model poised to strike than to snake models in coiled or sinusoidal postures (Etti...
Sensorimotor gating impairments induced by MK-801 treatment may be reduced by t...
Saletti, Patrícia Grandizoli; Maior, Rafael Plakoudi Souto; Hori, Etsuro; Nishijo, Hisao; Tomaz, Carlos Alberto BezerraDizocilpine (MK-801) is a non-competitive NMDA antagonist that induces schizophreniclike effects. It is therefore widely used in experimental models of schizophrenia including prepulse inhibition (PPI) impairments in rodents. Nevertheless, MK-801 has never been tested in monkeys on a PPI paradigm. In order to evaluate MK-801 effects on monkeys’ PPI, we tested eight capuchin monkeys (Sapajus spp.) using three di...
Fast detector/first responder : interactions between the superior colliculus-pu...
Soares, Sandra C.; Maior, Rafael Plakoudi Souto; Isbell, Lynne A.; Tomaz, Carlos Alberto Bezerra; Nishijo, HisaoPrimates are distinguished from other mammals by their heavy reliance on the visual sense, which occurred as a result of natural selection continually favoring those individuals whose visual systems were more responsive to challenges in the natural world. Here we describe two independent but also interrelated visual systems, one cortical and the other subcortical, both of which have been modified and expanded i...